Alice , I never knew you had such a lovely voice . You really can sing , can't you ?   Thanks , Mark . I used to be a member of the school choir .   No wonder you can control your voice so well . You are a professional singer .   Well , you are flattering me . I wouldn't say I am a professional , but I did receive some training at school . My music teacher used to be a professional singer .   Well , a good teacher makes good students .   You are quite right . 